InfinityInfinity - When did humans first contemplate the concept of infinity? Well the earliest known reference can be found in a section of the Yajur-Veda known as the Isha Upanishad. It simply reads, "From infinity is born infinity. When infinity is taken out of infinity, only infinity is left over." Whether or not this is a mathematical reference is unclear. If written to denote eternity, then there may be earlier references to this chronological concept found in the Bible. Infinity is clearly referred to as a mathematical value by the Greeks in the 5h century B.C.. The discovery of the value of π is too obscure and will not be speculated on here.